<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片 -->
    <el-card>
      <!-- 提示区 -->
      <el-alert
        title="添加商品信息"
        center
        type="info"
        show-icon
        :closable="false"
      > </el-alert>
      <!-- 步骤条区 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        align-center
        finish-status="success"
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <!-- tab栏 -->
        <el-tabs
          :before-leave="beforeTabLeave"
          v-model="activeIndex"
          tab-position="left"
          @tab-click="tabClick"
        >
          <el-tab-pane
            label="基本信息"
            name="0"
          >
            <el-form-item
              label="商品名称"
              prop="goods_name"
            >
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>

            <el-form-item
              label="商品价格"
              prop="goods_price"
            >
              <el-input
                v-model="addForm.goods_price"
                type="number"
              ></el-input>
            </el-form-item>

            <el-form-item
              label="商品重量"
              prop="goods_weight"
            >
              <el-input
                v-model="addForm.goods_weight"
                type="number"
              ></el-input>
            </el-form-item>

            <el-form-item
              label="商品数量"
              prop="goods_number"
            >
              <el-input
                v-model="addForm.goods_number"
                type="number"
              ></el-input>
            </el-form-item>

            <!-- 级联选择器 -->
            <el-form-item
              label="商品分类"
              prop=""
            >
              <el-cascader
                clearable
                v-model="addForm.goods_cat"
                :props="cateProps"
                :options="cateList"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane
            label="商品参数"
            name="1"
          >
            <!-- 渲染表单Item项 -->
            <el-form-item
              v-for="item in manyTableData"
              :key="item.attr_id"
              :label="item.attr_name"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane
            label="商品属性"
            name="2"
          >
            <el-form-item
              v-for="item in onlyTableData"
              :key="item.attr_id"
              :label="item.attr_name"
            >
              <el-input v-model="item.attr_vals">

              </el-input>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane
            label="商品图片"
            name="3"
          >
            <!-- action是图片要上传到的后台Api地址 -->
            <el-upload
              :headers='headerObj'
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :on-success='handleSuccess'
              list-type="picture"
            >
              <el-button
                size="small"
                type="primary"
              >点击上传
              </el-button>
            </el-upload>
          </el-tab-pane>

          <el-tab-pane
            label="商品内容"
            name="4"
          >
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button
              type="primary"
              class="btn_add"
              @click="add"
            >添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片视图 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%"
    >
      <img
        style="previewImg"
        :src="previewPtah"
        alt=""
      >
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'
export default {
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  created() {
    this.getCateList()
  },
  data() {
    return {
      activeIndex: '0',
      // 添加表单
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        // 商品详情
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }]
      },
      cateList: [],
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      manyTableData: [],
      onlyTableData: [],
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      headerObj: {
        Authorization: sessionStorage.getItem('token')
      },
      previewPtah: '',
      previewVisible: false
    }
  },
  methods: {
    // 获取所有cate数据
    async getCateList() {
      const { data: res } = await this.$http('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取列表失败')
      }
      this.cateList = res.data
      console.log(this.cateList)
    },
    // 级联选择器变化
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选中商品分类')
        return false
      }
    },
    async tabClick() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态列表失败')
        }
        // console.log(res.data)
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
        console.log(this.manyTableData)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态列表失败')
        }
        this.onlyTableData = res.data
        console.log(this.onlyTableData)
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      this.previewPtah = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片的操作
    handleRemove(file) {
      const tempPath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(x => x.pic === tempPath)
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm.pics)
    },
    handleSuccess(response) {
      // console.log(response)
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
      console.log(this.addForm.pics)
    },
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写必要表单项')
        // 执行添加
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // console.log(form)
        // 动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // console.log(form)
        // 发起请求添加商品
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  }
}
</script>
<style lang="less" scoped>
  .el-steps {
    margin: 15px 0;
  }
  /deep/ .el-step__title {
    font-size: 13px;
  }
  .el-checkbox {
    margin: 0 10px 0 0px !important;
  }
  .previewImg {
    width: 100%;
  }
  .btn_add {
    margin-top: 15px;
  }
</style>
